I noticed the same thing. I assumed that given that it is effectively the
only raptor (in the North Island I only saw the Falcon once) it has just
naturally expanded its range as the habitat was changed. Given time maybe
it will evolve into a "Spotted Harrier" in the grasslands?
On 27 January 2013 13:13, Andrew Hobbs <> wrote:
> Hi,
>
> We recently returned from a short holiday to New Zealand. We were
> surprised by the apparent abundance of Swamp Harriers as well as their
> apparent abundance in all types of habitat, from swamps and streams and
> even across large dry tussock grass areas such as in Central Otago and the
> Little Desert area in the rain shadow to the east of the central volcano
> area.
>
> I was wondering whether the apparent abundance was real or only apparent,
> and whether their habitat preference has broadened, possibly in response to
> reduced competition due to the paucity of other raptors.
>
> Does anyone have any information on this.
>
> Cheers
>
> Andrew
>
> --
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> Andrew Hobbs
>
>
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